Treatment on page 55. Mentioned on page 54. Stems glabrous or sparsely hirsute (hairs spreading). Leaves: basal blades mostly broadly elliptic to ovate, 1.5–3
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Vorobik Copyright: Utah State University Plants annual. Culms 30-200 cm, spreading, decumbent or stiffly erect; nodes usually glabrous or the lower nodes
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thick-based, spreading); blades linear-oblanceolate, 20–40 × 1–2 (–3) mm, margins entire, often coarsely spreading-ciliate, faces hispido-hirsute to hirsute or glabrous
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concealed or exposed, glabrous. Leaves evenly distributed; sheaths villous-hirsute, pilose, or occasionally glabrate, occasionally reddish-brown; auricles
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inflorescences, essentially smooth mericarps, relatively small calyx, spreading-hirsute stem base, and lack of rhizomes. It is more restricted in range and
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ciliolate distally, green zones lanceolate, sometimes foliaceous, apices spreading to ± squarrose, usually acute to obtuse or ± long-acuminate, mucronulate
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Association Herbs, annual, 3.5–7 dm, monoecious. Stems erect, pubescent, sparsely hirsute, and stipitate-glandular. Leaves: petiole 1.5–6.5 cm; blade ovate, 3–8 ×
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41. Herbs, annual. Stems prostrate, to 0.7 m, copiously sericeous and hirsute with white or gray antrorse hairs. Leaves obovate in outline, 1–4 × 2–4
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proximally (terminal lobes larger than laterals, faces glabrate to sparsely hirsute; distal sessile, lanceolate, reduced). Heads in open, corymbiform to thyrsiform
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crenate, faces finely hirsute to hispid (at least adaxial). Heads in paniculiform to corymbiform arrays. Peduncles hairy (hairs spreading to erect, relatively
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petiole 1–5 cm, glabrous or sparsely hirsute; blade obovate to round or reniform, 1–5 × 1–5 cm, sparsely villous to hirsute and green on both surfaces, becoming
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leaf-axils, (30–) 50–120 cm, well branched in distal 1/2, densely erect-hirsute to sometimes glabrous. Leaves: stipules narrowly deltate, 0.05–0.15 × 0
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purplish; nodes densely bearded with spreading to retrorse hairs above a glabrous ring; internodes pilose or ascending hirsute, hairs papillose-based, also puberulent;
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Mentioned on page 442. Plants hirsute, hispid, or glabrous. Stems unbranched or branched, (0.5–) 2–10 (–21) dm, (often hirsute or hispid, sometimes glabrous
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rhizomes. Stems 1–5+, erect (light-brown to grayish brown), densely hispidulo-hirsute. Leaves light green, thin to firm; basal withering by flowering, sessile
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(–3) × 0.5–3 dm, hirsute. Leaves basal; petiole 0.1–0.5 cm; blade narrowly lanceolate to oblanceolate, 0.5–2 × 0.8–2 (–2.2) cm, hirsute. Inflorescences
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widely spreading, divaricate to ascending, sometimes secund, ± densely leafy. Peduncles well developed, 0.3–3 (–5) cm, branches to 10 cm, spreading, bracteate
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Cindy Roché, Linda A. Vorobik Copyright: Utah State University Plants spreading to prostrate. Leaves mostly cauline; blades to 16 cm long, 2.8-8.3 mm wide
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cm; taprooted, caudices branched. Stems erect, densely pilose to hirsute or villoso-hirsute (hairs usually slightly ascending, loose, often mixed in orientations
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cm, becoming woody proximally, hirsute-pilose on at least proximal 2/3, hairs curved, loosely and irregularly spreading, nonseptate. Leaves basal and cauline;
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